997
FNCA52 TJSJ 270919
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
519 AM AST THU NOV 27 2025
DISCUSSION
ONCE AGAIN, QUICK MOVING SHOWERS WILL REACH WINDWARD LOCATIONS
DURING THE MORNING AND AFTERNOON ISOLATED SHOWERS ARE EXPECTED TO
DEVELOP MAINLY OVER INTERIOR TO SOUTHWESTERN PUERTO RICO. WINDS
WILL BE MAINLY FROM THE EAST AT AROUND 12 TO 20 MPH, WITH HIGHER
GUSTS AND SEA BREEZE VARIATIONS, INCREASING OVER THE NEXT FEW
DAYS. RH VALUES WILL BE NEAR THRESHOLD VALUES ALONG THE SOUTHERN
SLOPES AND PLAINS OF PR. EXPECT A SIMILAR TREND OVER THE NEXT
DAYS. LOW RISK OF FIRE WEATHER TODAY.
PRZ014-280930-
SOUTHEAST COASTAL PLAINS-
519 AM AST THU NOV 27 2025
TODAY TONIGHT FRI
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 20
TEMP (24H TREND) 89 (+4) 71 (-3) 88
RH % (24H TREND) 57 (-4) 92 (+5) 59
WIND 20FT/EARLY(MPH) E 18 G23 NE 11 E 16 G20
WIND 20FT/LATE(MPH) E 18 G23 NE 11 E 16 G20
MIXING HGT(FT-AGL/MSL)5400 4740
TRANSPORT WND (MPH) E 18 E 14
VENT RATE (KT-FT) 86400 56880
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-280930-
SOUTHERN HILLS-
519 AM AST THU NOV 27 2025
TODAY TONIGHT FRI
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 20
TEMP (24H TREND) 85 (+4) 66 (-4) 85
RH % (24H TREND) 61 (-5) 98 (+6) 62
WIND 20FT/EARLY(MPH) E 13 NE 12 E 12
WIND 20FT/LATE(MPH) E 13 NE 12 E 12
MIXING HGT(FT-AGL/MSL)5810 5190
TRANSPORT WND (MPH) E 18 E 14
VENT RATE (KT-FT) 92960 62280
DISPERSION 5 5
DSI 5 3 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-280930-
NORTH COASTAL PLAINS-
519 AM AST THU NOV 27 2025
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 40 40
TEMP (24H TREND) 88 (+3) 71 (-3) 88
RH % (24H TREND) 62 (-5) 97 (+6) 63
WIND 20FT/EARLY(MPH) E 19 G22 E 17 G19 E 18
WIND 20FT/LATE(MPH) E 19 G22 E 17 G19 E 18
MIXING HGT(FT-AGL/MSL)5240 4700
TRANSPORT WND (MPH) E 22 E 16
VENT RATE (KT-FT) 99560 65800
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-280930-
NORTHERN HILLS-
519 AM AST THU NOV 27 2025
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 40
TEMP (24H TREND) 86 (+3) 68 (-3) 86
RH % (24H TREND) 61 (-5) 98 (+4) 63
WIND 20FT/EARLY(MPH) E 18 E 14 E 16
WIND 20FT/LATE(MPH) E 18 E 14 E 16
MIXING HGT(FT-AGL/MSL)5570 5140
TRANSPORT WND (MPH) E 20 E 14
VENT RATE (KT-FT) 94690 61680
DISPERSION 5 5
DSI 6 4 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-280930-
WEST COAST-
519 AM AST THU NOV 27 2025
TODAY TONIGHT FRI
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 40 0 40
TEMP (24H TREND) 88 (+2) 67 (-3) 89
RH % (24H TREND) 61 (-2) 100 (+6) 61
WIND 20FT/EARLY(MPH) E 14 E 14 E 13
WIND 20FT/LATE(MPH) E 14 E 14 E 13
MIXING HGT(FT-AGL/MSL)5220 4480
TRANSPORT WND (MPH) E 14 E 9
VENT RATE (KT-FT) 62640 35840
DISPERSION 5 5
DSI 5 4 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-280930-
EASTERN INTERIOR-
519 AM AST THU NOV 27 2025
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 40 40
TEMP (24H TREND) 85 (+2) 68 (-4) 86
RH % (24H TREND) 64 (-2) 98 (+4) 65
WIND 20FT/EARLY(MPH) E 14 E 13 E 12
WIND 20FT/LATE(MPH) E 14 E 13 E 12
MIXING HGT(FT-AGL/MSL)5500 4990
TRANSPORT WND (MPH) E 18 E 14
VENT RATE (KT-FT) 88000 59880
DISPERSION 5 5
DSI 5 3 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-280930-
LUQUILLO MOUNTAIN RANGE-
519 AM AST THU NOV 27 2025
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY MCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 60 60 50
TEMP (24H TREND) 81 (+3) 67 (-3) 81
RH % (24H TREND) 70 (-1) 100 (+2) 71
WIND 20FT/EARLY(MPH) E 12 E 10 E 10
WIND 20FT/LATE(MPH) E 12 E 10 E 10
MIXING HGT(FT-AGL/MSL)4210 3660
TRANSPORT WND (MPH) E 20 E 16
VENT RATE (KT-FT) 71570 51240
DISPERSION 5 5
DSI 6 4 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-280930-
CENTRAL MOUNTAIN RANGE-
519 AM AST THU NOV 27 2025
TODAY TONIGHT FRI
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 0 30
TEMP (24H TREND) 84 (+5) 64 (-4) 84
RH % (24H TREND) 62 (-5) 99 (+2) 63
WIND 20FT/EARLY(MPH) E 12 E 11 E 10
WIND 20FT/LATE(MPH) E 12 E 11 E 10
MIXING HGT(FT-AGL/MSL)6190 5990
TRANSPORT WND (MPH) E 15 E 9
VENT RATE (KT-FT) 80470 47920
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-280930-
CAYEY MOUNTAIN RANGE-
519 AM AST THU NOV 27 2025
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 30 50
TEMP (24H TREND) 81 (+3) 67 (-2) 81
RH % (24H TREND) 69 (-1) 100 (+2) 69
WIND 20FT/EARLY(MPH) E 12 NE 10 E 10
WIND 20FT/LATE(MPH) E 12 NE 10 E 10
MIXING HGT(FT-AGL/MSL)4600 4110
TRANSPORT WND (MPH) E 21 E 15
VENT RATE (KT-FT) 82800 53430
DISPERSION 5 5
DSI 5 3 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-280930-
VIEQUES-
519 AM AST THU NOV 27 2025
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 50 50
TEMP (24H TREND) 86 (0) 75 (0) 86
RH % (24H TREND) 62 (+2) 89 (-4) 63
WIND 20FT/EARLY(MPH) E 17 G22 E 17 G21 E 14 G18
WIND 20FT/LATE(MPH) E 17 G22 E 17 G21 E 14 G18
MIXING HGT(FT-AGL/MSL)4010 3320
TRANSPORT WND (MPH) E 24 E 18
VENT RATE (KT-FT) 84210 53120
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-280930-
CULEBRA-
519 AM AST THU NOV 27 2025
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 50 50
TEMP (24H TREND) 87 (0) 75 (-1) 87
RH % (24H TREND) 58 (-3) 94 (+1) 61
WIND 20FT/EARLY(MPH) E 17 G21 E 17 G21 E 14 G18
WIND 20FT/LATE(MPH) E 17 G21 E 17 G21 E 14 G18
MIXING HGT(FT-AGL/MSL)3990 3460
TRANSPORT WND (MPH) E 24 E 20
VENT RATE (KT-FT) 83790 58820
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-280930-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
519 AM AST THU NOV 27 2025
TODAY TONIGHT FRI
CLOUD COVER MCLEAR CLEAR MCLEAR
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 20 0 10
TEMP (24H TREND) 90 (+4) 68 (-5) 90
RH % (24H TREND) 57 (-3) 97 (+9) 59
WIND 20FT/EARLY(MPH) E 20 G26 E 17 G21 E 19 G24
WIND 20FT/LATE(MPH) E 20 G26 E 17 G21 E 19 G24
MIXING HGT(FT-AGL/MSL)5900 4960
TRANSPORT WND (MPH) E 17 E 15
VENT RATE (KT-FT) 88500 64480
DISPERSION 5 5
DSI 5 3 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-280930-
SAINT THOMAS AND SAINT JOHN-
519 AM AST THU NOV 27 2025
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 50 40
TEMP (24H TREND) 86 (+1) 71 (-4) 86
RH % (24H TREND) 63 (-2) 100 (+5) 64
WIND 20FT/EARLY(MPH) E 18 G23 E 18 G23 E 16 G19
WIND 20FT/LATE(MPH) E 18 G23 E 18 G23 E 16 G19
MIXING HGT(FT-AGL/MSL)4000 3500
TRANSPORT WND (MPH) E 25 E 20
VENT RATE (KT-FT) 88000 59500
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-280930-
ST CROIX-
519 AM AST THU NOV 27 2025
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 40 50
TEMP (24H TREND) 86 (-1) 73 (-3) 86
RH % (24H TREND) 65 (+5) 96 (+7) 66
WIND 20FT/EARLY(MPH) E 18 G22 E 16 G20 E 14 G18
WIND 20FT/LATE(MPH) E 18 G22 E 16 G20 E 14 G18
MIXING HGT(FT-AGL/MSL)4740 4050
TRANSPORT WND (MPH) E 24 E 20
VENT RATE (KT-FT) 99540 68850
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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